Value of image property (C#)

Question

I'm trying to solve the problem of changing the value ImageDescription for the Bitmap object. To add a description for the file. Searching the related topics, I have not found a solution.

My code:

public Bitmap ImageWithComment(Bitmap image)
{
   string filePath = @"C:\1.jpg";
   var data = Encoding.UTF8.GetBytes("my comment"); 
   var propItem = image.PropertyItems.FirstOrDefault();
   propItem.Type = 2;
   propItem.Id = 40092;
   propItem.Len = data.Length;
   propItem.Value = data;
   image.SetPropertyItem(propItem);
   image.Save(filePath);
   return image;
}

But image with new comment dont save in folder(( Please help me

System.ArgumentException: Invalid parameter. in System.Drawing.Image.get_Width () at System.Drawing.Bitmap .. ctor (Image image) in WallpapersSite.Code.ImageActions.SaveImage (Bitmap image) — Voprosec Voprosec, Mar 05 '13 at 20:17

Stan R. · Accepted Answer · 2013-03-05T18:46:34.417

5

According to MSDN - Property Tags you have to use the proper int value for the Id

Sample

 using (var image = new Bitmap(@"C:\Desert.jpg"))
            {
                string filePath = @"C:\Desertcopy.jpg";
                var data = Encoding.UTF8.GetBytes("my comment");
                var propItem = image.PropertyItems.FirstOrDefault();
                propItem.Type = 2;
                propItem.Id = 0x010E; // <-- Image Description
                propItem.Len = data.Length;
                propItem.Value = data;
                image.SetPropertyItem(propItem);
                image.Save(filePath);
            }

using the following number from MSDN

image description code

after running the code, you can see how it affected the image

Before

original

After

after edit

edited Mar 05 '13 at 18:46

answered Mar 05 '13 at 18:39

Stan R.

15,757
4
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I need to change the description of the file, not EXIF. This property number - 40092 (int). – Voprosec Voprosec Mar 05 '13 at 20:06
propItem.Id = 40092; <=== This works and change is what I need – Voprosec Voprosec Mar 05 '13 at 20:09
I need a method to Accepted object type Bitmap, change its properties (description) and the return object type Bitmap – Voprosec Voprosec Mar 05 '13 at 20:11
public Bitmap ImageWithComment(Bitmap image) { var data = Encoding.UTF8.GetBytes("my comment"); var propItem = image.PropertyItems.FirstOrDefault(); propItem.Type = 2; propItem.Id = 40092; propItem.Len = data.Length; propItem.Value = data; image.SetPropertyItem(propItem); return image; } – Voprosec Voprosec Mar 05 '13 at 22:22
This function must modify the necessary properties, but this is not happening – Voprosec Voprosec Mar 05 '13 at 22:24
it's all the right methods, and they work. But alas, this is not what I need – Voprosec Voprosec Mar 05 '13 at 23:40
you're not posting the right code, your exception is being thrown from somewhere else..once you post that code we'll be able to help, otherwise i'm not sure what it is that you're asking. – Stan R. Mar 06 '13 at 01:15
I send the object Bitmap, but it's not changed and not saved – Voprosec Voprosec Mar 06 '13 at 07:11

score 1 · Answer 2 · answered Mar 05 '13 at 18:37

1

An ID of 40092 translates to 0x9C9C. According to this, that's not a valid property item id. According to this,

If the image format supports property items but does not support the particular property you are attempting to set, this method ignores the attempt but does not throw an exception.

From the looks of it, you want your ID to be 0x010E. Also, see here for details on each property item id.

answered Mar 05 '13 at 18:37

Scott Mermelstein

15,174
4
48
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I need a method to Accepted object type Bitmap, change its properties (description) and the return object type Bitmap – Voprosec Voprosec Mar 05 '13 at 20:26

Value of image property (C#)

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